Get a continuous glucose monitor. You should be able to convince your doctor to write you a prescription for it. If not, there brands that will do the prescription for you after a quick video call with a doctor (but they're more expensive).

Also the FDA cleared at least one brand of CGM to be sold without a prescription, starting "summer 2024": https://www.dexcom.com/stelo

You should expect to pay $80 - $200 per device, and they last one 14 days, but the insight they give is really worth it.